Microstructure and property of laser transformation hardening on sheet steel with high carbon content

1995 ◽  
Author(s):  
Wang Kunlin ◽  
Zhu Yunming ◽  
Dong Zhijuan ◽  
Zhang Renji
Keyword(s):  
Carbon Content ◽  
Sheet Steel ◽  
High Carbon ◽  
High Carbon Content ◽  
Laser Transformation Hardening

ALGOMA AR225

Alloy Digest ◽  
2003 ◽  
Vol 52 (12) ◽  
Keyword(s):  
Carbon Steel ◽  
Chemical Analysis ◽  
Physical Properties ◽  
Carbon Content ◽  
Brinell Hardness ◽  
Low Cost ◽  
Heat Treating ◽  
Rolled Plate ◽  
High Carbon ◽  
High Carbon Content

Abstract Algoma AR225 is a carbon steel developed primarily to supply a low-cost material for high-abrasion applications. It is furnished in the form of as-rolled plate with a relatively high carbon content (0.35-0.45%). AR-225 is sold on the basis of chemical analysis only; the number 225 signifies the approximate Brinell hardness. On thicknesses one-half inch and over, this Brinell value may be lower than 225 because of higher finishing temperatures. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, machining, and joining. Filing Code: CS-138. Producer or source: Algoma Steel Corporation Ltd.

Polyimide as carbon and ceramic polysilazane precursors to obtain high carbon content ceramic for high-temperature applications

2020 ◽  
Author(s):  
André V. B. Andrade ◽  
Luiz F. Belchior Ribeiro ◽  
Emanoelle Diz Acosta ◽  
Fernando J. Da Costa ◽  
Maíra D. Mallmann ◽  
...  
Keyword(s):  
High Temperature ◽  
Carbon Content ◽  
High Carbon ◽  
High Carbon Content ◽  
Temperature Applications

Effects of Carbon Concentration Upon Oxygen Precipitation in Cz Si

1987 ◽  
Vol 104 ◽  
Author(s):  
S. Hahn ◽  
M. Arst ◽  
K. N. Ritz ◽  
S. Shatas ◽  
H. J. Stein ◽  
...  
Keyword(s):  
Carbon Content ◽  
Carbon Concentration ◽  
High Carbon ◽  
High Carbon Content ◽  
Oxygen Precipitation ◽  
Oxygen Precipitate ◽  
High Carbon Concentration ◽  
Precipitation Characteristics ◽  
C Complex ◽  
Oxide Precipitate

ABSTRACTEffects of high carbon concentration upon oxygen precipitate formation in Cz silicon have been investigated by combining various furnace and rapid thermal annneals. Even though oxide precipitate density increases with increasing carbon levels, Cs, synchrotron radiation section topographs of processed high carbon content wafers (Cs ∼ 4ppma) exhibit Pendellosung fringes, indicating a strain free bulk state. Our optical microscopic data have also shown very few defect etch features inside the bulk. A model based upon a direct coupling of both SiO2 and Si-C complex formation reactions is used to explain rather unique oxygen precipitation characteristics in the high carbon content Cz Si materials.

Synthesis of high carbon content microspheres using 2-step microwave carbonization, and the influence of nitrogen doping on catalytic activity

Carbon ◽  
2013 ◽  
Vol 60 ◽  
pp. 307-316 ◽  
Author(s):  
Alum Jung ◽  
Suenghoon Han ◽  
Teawon Kim ◽  
Won Joon Cho ◽  
Kun-Hong Lee
Keyword(s):  
Catalytic Activity ◽  
Carbon Content ◽  
Nitrogen Doping ◽  
High Carbon ◽  
High Carbon Content

Assessment of the Fitness for Service of the Flamanville EPR Reactor Pressure Vessel Closure Head and Bottom Head Domes Containing a Segregation Zone Characterized by a High Carbon Content

2018 ◽  
Author(s):  
Isabelle Delvallée-Nunio ◽  
Olivier Loiseau ◽  
Daniel Monhardt ◽  
Audrey Buiron ◽  
Franck Dubois
Keyword(s):  
Fracture Toughness ◽  
Carbon Content ◽  
Charpy Impact ◽  
Fracture Analysis ◽  
Material Testing ◽  
Charpy Impact Energy ◽  
High Carbon ◽  
High Carbon Content ◽  
Segregation Zone ◽  
Positive Segregation

To complete the manufacturing process qualification of the closure head and bottom head domes of the Flamanville EPR RPV in 16MND5 ferritic steel (similar to A508 cl3), AREVA NP performed in 2014 material testing on a sacrificial dome so-called UA Sup. These tests revealed that the Charpy impact energy at 0°C — in the positive segregation zone at ¼ thickness — was lower than 60 J, the minimum value required by the French regulation. Thereafter, this result was explained by the high carbon content close to 0.3 % — against 0.18 % in the ladle — due to the forging process. The positive segregation was insufficiently eliminated to avoid high carbon content in certain location. As the level of Charpy impact energy is an indicator of the level of fracture toughness, a thorough material characterization of the segregation zone, as well as a brittle fracture analysis have been proposed and carried out by AREVA NP to demonstrate that the Flamanville EPR RPV domes are tough enough for a safe operation. The principles of the demonstration approach were reviewed by ASN and IRSN in 2015 and the final safety case was submitted to the ASN and IRSN review in December 2016. The latter led to the conclusion that, even if the segregation zone fracture toughness is lowered in comparison to that of the acceptance test zone, this does not put into question the Flamanville EPR RPV fitness for service as long as adequate in-service inspection of the domes is periodically performed. This paper aims at presenting the key elements of the IRSN assessment from part of which this conclusion was drawn, namely the material testing program, the description of the loadings in normal and accidental conditions, and the brittle fracture analysis.

Characterization of biomass and high carbon content coal ash for productive reuse applications

Fuel ◽  
2014 ◽  
Vol 116 ◽  
pp. 438-447 ◽  
Author(s):  
N.N. Nortey Yeboah ◽  
Christopher R. Shearer ◽  
Susan E. Burns ◽  
Kimberly E. Kurtis
Keyword(s):  
Carbon Content ◽  
Coal Ash ◽  
High Carbon ◽  
High Carbon Content

Effects of Starting Carbon Sources on the Carbothermal Synthesis of SiC Powders

2010 ◽  
Vol 105-106 ◽  
pp. 754-757 ◽  
Author(s):  
Jun Hua Cheng ◽  
Di Jiang Wen
Keyword(s):  
Carbon Content ◽  
Rice Husk ◽  
Carbon Sources ◽  
External Source ◽  
Laser Diffraction ◽  
Low Carbon ◽  
High Carbon ◽  
High Carbon Content ◽  
Carbothermal Synthesis ◽  
The Difference

Silicon carbide (SiC) powders have been prepared at 1200–1500°C by carbothermal reduction of two kind precursors of carbonl/silica mixtures: coked rice husk with high-carbon content, and gasified rice husk with low-carbon content mixed with carbon powders as an external carbon sources. The differences in nature of carbon matter in the external source and coked rice husk, and their effect on SiC synthesis have been studied by TG-DSC, TEM, XRD and laser diffraction technique. Experimental results show that the difference in nature of carbon source may affect the formation of SiC powders. The characteristics of the synthesized SiC particles strongly depend on the characteristics of the carbon sources.

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